What does calling Tk() actually do?

Question

I was brushing up on Tkinter when I looked upon a minimal example from the NMT Tkinter 8.5 Reference.

#!/usr/bin/env python
import tkinter as tk

class Appli         


        

Answer 1

Sometimes some widgets run Tk() on their own. But I don't know which widgets and why.

Sometimes it runs even if you don't use mainloop() - mostly on Windows.

Tkinter is strange wrapper on Tcl/Tk :)

But I prefer to use root = Tk() and root.mainloop() always.